body {
    font-size: 12px;
    margin: 0;
    width: 100%;
}

.content {
    display: inline-block;
    width: 40%;
    margin: 5px;
    box-sizing: border-box;
}

.content textarea{
    width: 30%;
}

.preview{
    display: inline-block;
    width: 20%;
    height: 80%;
    margin: 5px;
    vertical-align: top;
    box-sizing: border-box;
}

.sidebar{
    display: inline-block;
    width: 20%;
    box-sizing: border-box;
    vertical-align: top;
}
ul{
    list-style: none;
}
